Re: [HACKERS] questionable code in heap_formtuple()]

From: Bruce Momjian <maillist(at)candle(dot)pha(dot)pa(dot)us>
To: maillist(at)candle(dot)pha(dot)pa(dot)us (Bruce Momjian)
Cc: t-ishii(at)sra(dot)co(dot)jp, hackers(at)postgreSQL(dot)org
Subject: Re: [HACKERS] questionable code in heap_formtuple()]
Date: 1998-09-04 17:51:13
Message-ID: 199809041751.NAA10337@candle.pha.pa.us
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> > around line 812 in access/common/heaptuple.c:
> >
> > len = sizeof *tuple - sizeof tuple->t_bits;
> >
> > This seems questionable for me.

> > I think more acculate way to calculate the offset is:
> >
> > len = (char *)&tuple->t_bits[0] - (char *)tuple;

OK, now I am more confused. Doesn't this work:

len = sizeof(HeapTupleData) - offsetof(HeapTupleData.t_bits);

while your solution is finding the size of the area before t_bits?

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